CVE-2026-56778

n8n before 2.25.7 and 2.26.x before 2.26.2 contains an authorization bypass in the Public API execution retry endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a shared workflow can use the Public API to retry executions of that workflow, bypassing the intended permission boundary between read and execute access. This affects instances where workflows are shared with other users or across projects.

CVSS v3 6.4 MEDIUM

6.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.1 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-h3jj-5f3v-3685	Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/n8n-authorization-bypass-in-public-api-execution-retry-endpoint	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n::::::node.js::*

History

25 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) n8n anterior a 2.25.7 y 2.26.x anterior a 2.26.2 contiene un bypass de autorización en el endpoint de reintento de ejecución de la API Pública, que autoriza el acceso usando el ámbito workflow:read en lugar de workflow:execute. Un usuario autenticado con acceso de solo lectura a un flujo de trabajo compartido puede usar la API Pública para reintentar ejecuciones de ese flujo de trabajo, omitiendo el límite de permisos previsto entre el acceso de lectura y el de ejecución. Esto afecta a las instancias donde los flujos de trabajo se comparten con otros usuarios o entre proyectos.

Information

Published : 2026-07-08 14:17

Updated : 2026-10-29 19:17

NVD link : CVE-2026-56778

Mitre link : CVE-2026-56778

CVE.ORG link : CVE-2026-56778

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-863

Incorrect Authorization

{"id": "CVE-2026-56778", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56778", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-08T14:24:00.966635Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 3.1}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "disclosure@vulncheck.com", "affectedData": [{"vendor": "n8n", "product": "n8n", "versions": [{"status": "affected", "version": "2.26.0", "lessThan": "2.26.2", "versionType": "semver"}, {"status": "unaffected", "version": "2.26.2", "versionType": "semver"}], "packageURL": "pkg:npm/n8n", "defaultStatus": "unaffected"}, {"vendor": "n8n", "product": "n8n", "versions": [{"status": "affected", "version": "0", "lessThan": "2.25.7", "versionType": "semver"}, {"status": "unaffected", "version": "2.25.7", "versionType": "semver"}], "packageURL": "pkg:npm/n8n", "defaultStatus": "unaffected"}]}], "published": "2026-07-08T14:17:17.683", "references": [{"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-h3jj-5f3v-3685", "tags": ["Mitigation", "Vendor Advisory"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/n8n-authorization-bypass-in-public-api-execution-retry-endpoint", "tags": ["Third Party Advisory"], "source": "disclosure@vulncheck.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "n8n before 2.25.7 and 2.26.x before 2.26.2 contains an authorization bypass in the Public API execution retry endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a shared workflow can use the Public API to retry executions of that workflow, bypassing the intended permission boundary between read and execute access. This affects instances where workflows are shared with other users or across projects."}, {"lang": "es", "value": "n8n anterior a 2.25.7 y 2.26.x anterior a 2.26.2 contiene un bypass de autorizaci\u00f3n en el endpoint de reintento de ejecuci\u00f3n de la API P\u00fablica, que autoriza el acceso usando el \u00e1mbito workflow:read en lugar de workflow:execute. Un usuario autenticado con acceso de solo lectura a un flujo de trabajo compartido puede usar la API P\u00fablica para reintentar ejecuciones de ese flujo de trabajo, omitiendo el l\u00edmite de permisos previsto entre el acceso de lectura y el de ejecuci\u00f3n. Esto afecta a las instancias donde los flujos de trabajo se comparten con otros usuarios o entre proyectos."}], "lastModified": "2026-10-29T19:17:23.480", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "BF3AA8D6-D35E-4D7B-B4E5-819275C0C91B", "versionEndExcluding": "2.25.7"}, {"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "970A6AA3-03FF-4B9D-85C1-462C5C7F7171", "versionEndExcluding": "2.26.2", "versionStartIncluding": "2.26.0"}], "operator": "OR"}]}], "sourceIdentifier": "disclosure@vulncheck.com"}